Issue creating a 2D mesh for Ansys Fluent

[hinnebuschs]

Hi,

I am currently working on generating a 2D geometry using Ansys Prime for use in PyFluent, but I am encountering issues when attempting to export the mesh or open the mesh file in PyFluent. If I use this geometry in Workbench, I can generate the mesh and open it in Fluent without any issues. Am I able to generate a 2D fluent mesh in Prime, and if so, how can I get past the following errors?

1. I've tried saving the results as a .msh file, but I get the following error when launching pyFluent:
   Error: This appears to be a surface mesh. Surface meshes cannot be read under the /file/read-case functionality. Error Object: #f

2. I try saving the results as a .cas.h5 file, but I get this error in Prime.
   ansys.meshing.prime.internals.error_handling.PrimeRuntimeError: Cell zonelets not found to export fluent case.

Below, I have included the code I am using along with the attached geometry file for reference. Any assistance in resolving these issues would be greatly appreciated.
Thank you,
Shawn

import ansys.meshing.prime as prime
import ansys.fluent.core as pyfluent
ansysPath = r"C:\Program Files\ANSYS Inc\v251\meshing\Prime"

def meshGeometry():
    with prime.launch_prime(prime_root= ansysPath) as prime_client:
        model = prime_client.model
        mesh_util = prime.lucid.Mesh(model=model)
        mesh_util.read(file_name='test_2D.scdoc')
        mesh_util.surface_mesh(max_size=1.0, min_size=0.05, generate_quads=True) 
        mesh_util.create_zones_from_labels()

        for part in model.parts:
            if len(part.get_topo_faces()) > 0:
                part.delete_topo_entities(
                    prime.DeleteTopoEntitiesParams(
                        model, delete_geom_zonelets=True, delete_mesh_zonelets=False
                    )
                )
        print(model)
        mesh_util.write('testMesh.msh')
        mesh_util.write('testMesh.cas.h5') # ansys.meshing.prime.internals.error_handling.PrimeRuntimeError: Cell zonelets not found to export fluent case.
        prime_client.exit()

def launchSolver(file_name):
    solver = pyfluent.launch_fluent(dimension=2,mode="solver",)
    solver.settings.file.read_case(file_name=file_name)
    print(solver)

meshGeometry()
launchSolver('testMesh.msh')

I'm using the following versions:
Ansys 2025 R1
ansys-meshing-prime=0.8.1
ansys-api-fluent=0.3.36
ansys-api-meshing-prime=0.1.4
python=3.11

test_2D.zip

[waltersma]

Hi @hinnebuschs,

As of today, 2D solver mesh export to Fluent is not exposed as a capability within the client. If you feel this is required then we can convert this to an enhancement request moving forward.

Thanks
(Cc @prajaktmahajan )